Situation : clamAV installed from WHM, but not working on the command line.

FIX:
If you have have already installed ClamAV through WHM, check to make sure that your executables are here
#ls -lah /usr/local/cpanel/3rdparty/bin/*clam*
If they are, make sure that there are no current ClamAV files in /usr/local/bin:
# ls -l /usr/local/bin/*clam*
If both of those check out, you can create symlinks in /usr/local/bin to make scanning your server easier.
ln -s /usr/local/cpanel/3rdparty/bin/freshclam /usr/local/bin/freshclam
ln -s /usr/local/cpanel/3rdparty/bin/clamscan /usr/local/bin/clamscan
ln -s /usr/local/cpanel/3rdparty/bin/clamd /usr/local/bin/clamd
ln -s /usr/local/cpanel/3rdparty/bin/clamav-config /usr/local/bin/clamav-config
Double check your work with this command:
# ls -l /usr/local/bin/*clam*
Then you can scan your server’s public_html folders with this command
clamscan -ir /home/*/public_html > /usr/local/src/scan.txt [The scan results will get saved to the “scan.txt” file]